i have a credit card in the philipines citibank and i never used it, &destroyed the card how come they bill me

i have a credit card in the philipines citibank and i never used it, &destroyed the card how come they billed me i did not even use the initial pin they give to me and the CSR or agent even promise me that it wont be activated unless i pin it myself. could anyone help [...] http://bit.ly/ophDDi